Willis Appoints Lesley Harding as CEO of Captive Practice in Europe

Hire Strengthens Willis’ Captive team and
Recognises New Opportunities in the Captive Market

London, UK, February 28, 2013 – Willis Group Holdings (NYSE: WSH), the global risk advisor and insurance
broker, has appointed Lesley Harding as Chief Executive Officer (CEO) of the Willis Global Captive Practice
in Europe, effective March 1. Reporting to Malcolm Cutts-Watson, Chairman of the Willis Global Captive Practice
– Europe, Harding will lead the European captive management and advisory team.

After joining Willis in 2003, Harding has most recently been a Client Advocate with Willis’ Global Solutions
team focused on developing and managing relationships with a number of Willis’ global clients – particularly
in the Energy industry.

Prior to joining Willis she was an underwriter at Swiss Re and helped to set up Arch’s
European operations. She was also a risk manager at Texaco's wholly owned subsidiary Heddington Insurance Limited.

“We see great potential in Europe for the growth of captives,” said Cutts-Watson. “This is because organisations
are seeking to reduce their dependence on the commercial insurance market and increasingly looking at alternative
means of funding risks. A captive provides a structured approach to the management of retained risk,
generating financial savings and operational benefits.”

Commenting on Harding’s appointment, Cutts-Watson added: “Lesley’s appointment strengthens the leadership team and helps us better respond
to untapped opportunities in the captive market. Her recent experience will facilitate enhanced connectivity within Willis
and greater understanding of how captive services and solutions add value to our clients’ businesses. Her
extensive knowledge of risk financing strategies and the demands of global companies make her the ideal
candidate.”

Harding commented: “I am delighted to join the Willis Global Captive Practice. I have worked with many
of the team and admire their technical expertise and focus on client service. I see my
role as building on this solid platform to achieve even greater success.”

About Willis

Willis Group Holdings plc is a leading global insurance broker. Through its subsidiaries, Willis develops and delivers
professional insurance, reinsurance, risk management, financial and human resource consulting and actuarial services to corporations, public
entities and institutions around the world. Willis has more than 400 offices in nearly 120 countries,
with a global team of approximately 17,000 employees serving clients in virtually every part of the
world. Additional information on Willis may be found at www.willis.com.